一种新型扇形波束天线  

A New Kind of Fan-beam Antennas

作　　者：林岩[1] 

机构地区：[1]桂林空军学院五系,桂林541003

出　　处：《微波学报》2003年第3期63-66,91,共5页Journal of Microwaves

摘　　要：通过数值计算发现 ,在垂直于天线对称轴的平面内向天线对称轴平移抛物面的两个精心选定的对称部分后 ,赋形抛物面天线可产生扇形波束。馈源方向图为cosθ、抛物面口径半径为 0 .8m的抛物面经赋形后E、H平面的半功率宽度分别可达到 5.3 6°、0 .90° ,而E、H平面的副瓣电平分别为 -6.84dB、-7.86dB。A calaulation method and calaulation results show that a new kind of shaped paraboloid antennas can produce fan beam. The shaped method is moving the selected portion of the paraboloid toward axis of paraboloid. E -plane and H plane half power beamwidth of the shaped paraboloid are 5.36° and 0.90° respectively; E plane and H plane sidelobe levels of the shaped paraboloid are respectively -6.84dB?-7.86dB (the radiation pattern of the feed is cos θ and the aperture radius of the paraboloid before shaping is 0.8m).

关 键 词：扇形波束天线 赋形抛物面天线 半功率宽度 副瓣电平 搜索天线 

分 类 号：TN821[电子电信—信息与通信工程]